in this paper, a stochastic two-stage model is offered for optimization of the day-ahead scheduling of the microgrid. system uncertainties including dispatchable distributed generation and energy storage contingencies are considered in the stochastic model. for handling uncertainties, monte carlo simulation is employed for generation several scenarios and then a reduction method is used to d...

Automatic generation control in electric power system design is a major concern nowadays due to its rising size, varying structure, integration of renewable-energy sources and distributed generators to meet the growing demand. In this paper, automatic generation control of an interconnected four area hydro thermal system examined. Each area equipped with reheat turbine for thermal system and hy...

Numerische Methoden der Ventilationsauslegung von Hydrogeneratoren werden kontinuierlich verbessert. Die vorliegende Arbeit zeigt eine qualitative Momentaufnahme des Entwicklungsstatus und einen Ausblick der Weiterentwicklung in Andritz Hydro durch eine komprimierte Darstellung Anwender-relevanter und kritischer Eigenschaften der Methoden. Pumpspeichergeneratoren (meist Grenzleistungs-Hydrogene...

For enhancing the regulation performance and efficient operation of pumped storage power plant, this paper proposed to combine a hydro-generator set with full-size converter achieve decoupling control machine grid. On basis model test, characteristics certain pump-turbine had been discussed implication for was highlighted. At same time, modeling side were presented, simulation results showed th...

Introduction. The main factors, which negatively influence on durability of balancing ring sectional pump, are presented. Object study. pumps the dewatering facilities kimberlite mine “Udachny”. purpose research. Assessment waters solid phase degree pump to clarify expected technical and economic effect penetration an additional clarifying tank in conditions drainage Research methodology.The re...

The asymmetric unit of the title compound, C(6)H(7)N(2)O(2) (+)·Cl(-), contains two independent ion pairs. A monoclinic form of the title compound with only one ion pair in the asymmetric unit has been reported previously [Ploug-Sørensen & Andersen (1986). Acta Cryst. C42, 1813-1815]. In the crystal of the title compound, the components are linked into layers parallel to (001) by inter-molecula...

Mathematical models for the electricity portfolio management of a utility that owns a hydro-thermal generation system and trades on the power market often lead to complex stochastic optimization problems. We present a new approach to solving stochastic hydro-storage subproblems that occur when stochastic Lagrangian relaxation is applied to solving such models. The special structure of such hydr...